Speed-measure



SPEED MEASURE.

(NO el.)

No. 449,898. Patented Mar.31,1891.

. INVE OR: W

ATTO EY.

UNITED STATES PATENT OFFICE.

GEORGE BERRY, OF BALTIMORE, MARYLAND.

SPEED-MEASURE.

SPECIFICATION forming part of Letters Patent N 0. 449,398, dated March 31, 1891.

Application filed January 2, 1891. Serial No- 376,476. (No model.)

To aZZ whom it may concern.-

Be it known that I, GEORGE BERRY, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Speed-Indicators, of which the following is a specification.

This invention relates to that class of speedindicators designed for determining the rate of speed of shafts or other revolving parts of machinery; and my object is to accomplish this result by a more simple arrangement of parts than has heretofore been found necessary.

\Vith this end in view the invention consists in an indicator in which a sliding revoluble spindle for transmitting the motion of the shaft to the registering mechanism directly actuates the push-pin of the time-measuring stop mechanism, whereby the registering mechanism and the time-measu ring mechanism will be simultaneously started and stopped and the number of revolutions of a shaft during anylength of time read from the dials of the indicator.

It further consists in certain peculiar features of construction and combinations of parts, which will be described hereinafter, and pointed out in the claims.

In the accompanying drawings, illustrating the invention, Figure 1 represents a face view of the indicator; Fig. 2, a similar view with the cover of the case removed; Fig. 3, a longitudinal section taken on the line 3 3 of Fig. 1, and Fig. at a back view.

The case in which the working parts are inclosed comprises a partly-circular portion A, containing the time-measu ring mechanism, and a rectangular portion A, containing the registering mechanism.

The case is provided with a cover B, having a circular opening I), through which the dial of the timenneasuring mechanism is visible and said cover also has upon its face the dials q 1r of the speed-registering mechanism.

At that end of the case containing the timemeasuring mechanism a suitable handle C is affixed, and from the opposite end of the case protrudes the spindle D, by means of which the motion of the shaft or other revolving part is transmitted to the speed-registering mechanism.

As before stated, the time-measuring mechanism occupies the partly-circular portion of the case; and it consists of an ordinary stopwatch E, having a push-pin c, which projects toward the rectangular portion of the case. The back of the circular part of the case is open, as at l), to afford access to the watch for winding and setting, as shown in Fig. 4.

The spindle D is free to revolve and slide in the end of the case and extends through guides (Z, secured to the side of the case, and beyond these guides it has a reduced end 6, which fits in a socket in the end of the pushrod F, and can revolve freely therein. This push-rod is also mounted in a g1'1idef,pro jecting from the side of the case, and may slide endwiso, but does not revolve, and is connected to the push-pin c ofthe stop-watch by means of a grip-claw g on the end of said push-rod, which takes behind the head 0' of the said push-pin. The push-rod F has at its other end a head h, and a spiral spring 2' is disposed on the push-rod between the said head and the guidef, and serves to keep the push-rod F and spindle D distended when the mechanism of the watch is stopped. A suitable collar j is fixed to the spindle D inside the case and abuts against the latter to limit the sliding movement of the spindle. On the said spindle between its two guides d isplaced a sleeve-worm I, through which extends a feather-key m on the said spindle. This feather takes in a groove in the sleeve. It will thus be seen the worm I will turn with the spindle, but the latter is free to slide through the worm. This worm meshes with a gear-wheel n, fixed on an arbor 0, which projects through the casecover l3 and on the outside carries a hand p, which moves overa dial g on the face of said cover. The gearwheel 12 has one hundred teeth, and at each revolution of the spindle D and worm l the said wheel is moved one tooth, and hence one hundred revolutions of the spindle will give one complete revolution of the gear-wheel n. The dial q is graduated correspondingly up to one hundred, and the dial-hand 19 will thus register up to one hundred on this dial. A

ICO

second gear-wheel r is mounted in the case beside the wheel a and overlaps the same. This wheel has thirty pointed teeth 5, and the first gear-wheel n has on its face a single corresponding tooth s, which at each revolution engages one tooth of the second gear-wheel 0*. It will thus be apparent that every time the sear-wheel n makes acomplete revolution the second wheel 7' will be moved one tooth. The said wheel 7' is fixed on an arbor 0", which projects through the top of the case, and on the outside carries a hand t, which moves over a dial won the face of said cover. This'dial has thirty graduations to correspond with the teeth on the wheel 0. It will be obvious that thirty revolutions of the first gear-wheel n and dial-hand 1) will give one complete revolution of the second wheel 0. These thirty revolutions of the wheel a indicate three thousand revolutions of the spindle D, which will thus be registered on the dial w. A

check-sprin g r engages with the second wheel 1' and prevents it from turning accidentally.

The manner of using my indicatoris as follows: The second-hand .rof the stop-watch and the dial-hands p and tare all to be set at zero. The extremity 1 of the spindle D is inserted in the end of the shaft whose speed is to be taken, and must be so engaged therewith asv to insure that it will revolve at the same rate of speed. The spindle is thus forced to slide back into the case and pushes the push-rod F, which in turn presses the push-pin c of the watch, thus releasing the stop mechanism of the latter and starting the watch. At the same time the motion of the shaft is transmitted through the spindle D and worm Z to the gear-wheel n, whereby the revolutions of the shaft are indicated on the dials q and w, as previously explained. It will be observed that the spiral springt' is compressed in pushing back the rod F; and hence when the spindle D is removed from contact with theshaft the said spring will immediately throw out the push-rod and spindle to their firstposition, and thus also draw out the push-pin c of the watch, and thereby instantly stop the latter. It will be obvious that the speed-registering mechanism is simultaneously stopped. The exact speed of the shaft can now be read from the dials q and w and the face of the Watch. It will be observed that with this indicator the number of revolutions of a shaft during any period of time can be ascertained, and it will also be seen that it will operate in connection with a shaft revolving in either direction.

In order that the stop-watch may be employed as an ordinary time-piece when not used for registering speed, I provide a spring 2 fastened on the outside of the case and having an arm 2, which enters the case. By

The

Moreover, when the spindle is limited by its collar j coming in contact with the guide-piece cl.

It will be evident that the gear-wheels and dials might be arranged in different ways than shown, and that other changes could be made in the construction and arrangement of parts comprising the invention. Therefore the invention is not confined to the construction shown.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a speed-indicator, the combination of a sliding spindle free to revolve in opposite directions for receiving and transmitting the rotary movement of the part of machinery whose speed is to be taken. mechanism for registering the revolutions of said part actuated by the rotary movement of the said spindle, and time-measuring stop mechanism having a push-pin c, which is actuated by the sliding movement of the saidspindle.

2. In a speed-indicator, the combination of a sliding spindle free to revolve in opposite directions for receiving and transmitting the rotary movement of the part of machinery whose speed is to be taken, mechanism for registering the revolutions of the said part actuated by the rotary movement of the said spindle, tim e-measuring stop mechanism having a push-pin c, and a spring-pressed pushrod which slides, but does not revolve, and has a connection with the said push-pin.

3. In a speed-indicator, the combination of a sliding revoluble spindle for receiving and transmitting the rotary movement of the part of machinery whose speed is to be taken, mechanism for registering the revolutions of the said part, aworm through which said spindle slides, but which revolves with the spindle and actuates said registering mechanism, a spring-pressed push-rod F, which is actuated by the sliding movement of the spindle, and time-measuring stop mechanism having a push-pin, which is connected to the said push-rod.-

4. In a speed-indicator, the combination of a sliding spindle free to revolve in opposite directions for receiving and transmitting the rotary movement of the part of machinery whose speed is to be taken, mechanism for registering the revolutions of the said part actuated by the rotarymovemcnt of the said spindle, time-measuring stop mechanism hav- In testimony whereof I alfix my signature in the presence of two witnesses.

GEORGE BERRY. Witnesses:

F. P. DAVIS, JNo. T. MADDOX. 

